| 摘要 |
485,157. Hats etc.; felt &c. TRIGGS, W. W. (United States Hat Machinery Corporation) Jan. 14, 1938, No. 1291. [Class 63] [Also in Group VIII] The invention relates to a process and machine for shrinking hat bats and like felt articles. The machine produces a changing series of elevations and depressions from one edge of the article to the other while maintaining portions of the article between the depths of the depressions and the crests of the elevations free of pressure. The machine has a set of rollers A, Figs. 3, 4, supporting the bats 16 and a set B above the bats. Each roller includes a shaft 10 with spaced discs 11, 12 arranged alternately and internested, as it were, the disc of one roller extending into the space between the discs of the next roller. A single bat or a number of bats may be stacked one upon another in passing through the machine. Pipes 15 may spray the bats with boiling water. The operation on the bat is shown exaggerated at Fig. 7. Discs 11a form spaced apart elevations 16a and discs 12a depressions 17a so that the bat is transversely waved. Further progress of the bat reverses the process. The bats are repeatedly bent up and down and saturated with boiling water. This results in shrinking and interlocking the fur fibres. The discs engage the bat at spaced points only, the intermediate portions being free of pressure. The upper rollers B may be urged towards rollers A by springs 30 but their weight alone may be sufficient. The supporting rollers are positively driven and the upper rollers frictionally, but a direct drive may be given the rollers B. |
